We have recently added Spider Bottles to our TSK Supply store. Currently they come in two sizes and have a variety of uses. Breather holes are in the cap which opens on a plastic hinge so only part of the lid opens. This makes it easy to add food or water to the inside. Think of them as giant salt and pepper shakers. That's what they look like to me. Could be used for Isopods as well. In the future we may add a shorter size as well.